CSR8635 View Datasheet(PDF) - CSR plc
Part Name
Description
Manufacturer
CSR8635 Datasheet PDF : 105 Pages
| |||
Note:
CSR8635 QFN is designed for a differential audio output. If a single-ended audio output is required, use an external
differential to single-ended converter.
9.2 Audio Codec Interface
The main features of the interface are:
â– Stereo and mono analogue input for voice band and audio band
â– Stereo and mono analogue output for voice band and audio band
■Support for I²S stereo digital audio bus standard
â– Support for PCM interface including PCM master codecs that require an external system clock
Important Note:
13 To avoid any confusion regarding stereo operation this data sheet explicitly states which is the left and right channel
20 for audio output. With respect to audio input, software and any registers, channel 0 or channel A represents the
7, left channel and channel 1 or channel B represents the right channel.
ber 2 9.2.1 Audio Codec Block Diagram
ptem Stereo Audio and Voice Band Input
, Se LINE_BP
ay LINE_BN
High-quality ADC
Digital Codec
Digital Circuitry
16
Input B
n - Frid LINE/MIC_AP
.c LINE/MIC_AN
t.com Stereo Audio and Voice Band Output
oin SPKR_LN
lp SPKR_LP
exce SPKR_RN
hou - SPKR_RP
Low-pass Filter
Low-pass Filter
High-quality ADC
Digital Codec
16
Input A
High-quality DAC
16
High-quality DAC
16
ven.z Figure 9.2: Audio Codec Input and Output Stages
o ke The CSR8635 QFN audio codec uses a fully differential architecture in the analogue signal path, which results in low
gb noise sensitivity and good power supply rejection while effectively doubling the signal amplitude. It operates from a
in dual power supply, VDD_AUDIO for the audio circuits and VDD_AUDIO_DRV for the audio driver circuits.
for q 9.2.2 ADC
ared Figure 9.2 shows the CSR8635 QFN consists of 2 high-quality ADCs:
ep â– Each ADC has a second-order Sigma-Delta converter.
Pr â– Each ADC is a separate channel with identical functionality.
â– There are 2 gain stages for each channel, 1 of which is an analogue gain stage and the other is a digital gain
stage, see Section 9.2.4.
9.2.3 ADC Sample Rate Selection
Each ADC supports the following pre-defined sample rates, although other rates are programmable, e.g. 40kHz:
â– 8kHz
â– 11.025kHz
â– 16kHz
â– 22.050kHz
â– 24kHz
â– 32kHz
â– 44.1kHz
â– 48kHz
Production Information
© Cambridge Silicon Radio Limited 2013
Confidential Information - This Material is Subject to CSR's Non-disclosure Agreement
Page 38 of 105
CS-303725-DSP5
www.csr.com
Share Link: 